Blockly is a web-based visual programming editor and block-based code generator. It allows users to create programs by interlocking graphical blocks that translate into executable source code for various programming languages, removing the need for manual syntax entry.
The project serves as a customizable framework for building specialized visual languages through a customizable block library. It includes a visual block designer for defining custom shapes, behaviors, and specialized input fields, as well as a plugin system to extend the editor's environment.
The system manages programming logic through variable scoping and provides a workspace with navigation tools, contextual block suggestions, and bulk manipulation capabilities. Accessibility is integrated into the interface to support keyboard-only navigation and screen reader compatibility.